中国层控矿床地球化学研究

层控矿床是指那些局限于一定地层并与岩浆活动没有直接联系的矿床。沉积矿床一般不包括于层控矿床中,尽管它也受地层控制。“中国层控矿床地球化学”课题研究的最终成果包括专著三卷(1984、1987、1988)和研     

我国混合岩化后改造型金矿床的地球化学及其成因讨论

本文论述了一种新的重要层控金矿类型——产于我国华北地台太古界中的混合岩化后改造型金矿床的地质、矿物及地球化学特征。利用地质观察、稳定及放射性同位素组成、包裹体成分及微量元素等综合方法证明成矿物质及矿液主要来自金的矿源层,矿床为海西及燕山期构造-热液的改造作用产物。     

GEOCHEMISTRY AND GENESIS OF POSTMIGMATIZATION-REFORMED GOLD DEPOSITS IN CHINA

This paper deals with the geological, minoralogieal and geoehemical characteristies of anew type of strata-bound gold deposits of postmigmatization-reformed typo occurring in theArchean metamorphic rocks of North China Platform. The integrated results of geologic stud-ics, stable and radioactive isotopic compositions, constituents in minerals inclusions and traceelement data provide evidence to show that ore-forming materials and ore-fluids are mainlyfrom Archean gold source beds, and ore bodies are the products of tectonic-hydrothermal re-forming process at the Hercynian and the Yenshanian times. By a comparison of the natureof this type to the gold deposits in Archean greenstone belts abroad, it is suggested that theyare different in genesis. Postmigmatization-reformed gold deposits are formed under specialconditions. They are mainly developed in later activation zones of platform along the westcoast of ttie Pacific Ocean. This paper presents a model for the formation of this type ofgold deposits.